Transmitting Apparatus and Radio Resource Assignment Method

1. A transmission apparatus comprising: an assignment unit configured to determine a frequency block to be assigned to each user, wherein the frequency block is formed by a plurality of subcarriers in a frequency domain and a plurality of OFDM symbols in a time domain, a length of the frequency block in the time domain corresponds to a transmission slot, and a plurality of frequency blocks are placed in the frequency domain over a system frequency band, each of the plurality of frequency blocks including a same number of subcarriers; and a transmission unit configured to transmit data in the frequency block determined by the assignment unit, wherein, when assigning frequency blocks for one user to two or more consecutive transmission slots, the assignment unit makes a determination so that a frequency block including the same number of subcarriers and including a plurality of OFDM symbols, and assigned to a first transmission slot and a frequency block including the same number of subcarriers and including a plurality of OFDM symbols, and assigned to a second transmission slot are continuous in the time domain and are separated by a predetermined gap in the frequency domain, wherein the assignment unit assigns a common control channel to an OFDM symbol at a head part of a part of the plurality of frequency blocks, and wherein the assignment unit assigns a channel for transmitting control information indicating a selected user to an OFDM symbol at a head part in a frequency block which is different from a frequency block to which the common control channel is assigned.

2. The transmission apparatus according to claim 1 , further comprising a scheduling unit configured to select a user based on information indicating reception quality from each user.

3. The transmission apparatus according to claim 2 , wherein the assignment unit assigns at least one of a common control channel and a channel for transmitting control information indicating a selected user to at least one frequency block of the plurality of frequency blocks.

4. The transmission apparatus according to claim 2 , wherein the scheduling unit determines a radio parameter used for transmission to a user.

5. The transmission apparatus according to claim 1 , wherein the assignment unit assigns at least one of a common control channel and a channel for transmitting control information indicating a selected user to at least one frequency block of the plurality of frequency blocks.

6. The transmission apparatus according to claim 1 , wherein the assignment unit assigns at least one of a common control channel and a channel for transmitting control information to at least one OFDM symbol of a plurality of OFDM symbols forming the frequency block.

7. The transmission apparatus according to claim 6 , wherein the assignment unit assigns at least one of the common control channel and the channel for transmitting control information indicating a selected user to OFDM symbols at a head part of the frequency block.

8. The transmission apparatus according to claim 1 , wherein the assignment unit performs assignment based on at least one of data rate and mobility.

9. An assignment method comprising the steps of: determining a frequency block to be assigned to each user, wherein the frequency block is formed by a plurality of subcarriers in a frequency domain and a plurality of OFDM symbols in a time domain, a length of the frequency block in the time domain corresponds to a transmission slot, and a plurality of frequency blocks are placed in the frequency domain over a system frequency band, each of the plurality of frequency blocks including a same number of subcarriers; and transmitting data in the determined frequency block, wherein, when assigning frequency blocks for one user to two or more consecutive transmission slots, the step of determining includes making a determination so that a frequency block including the same number of subcarriers and including a plurality of OFDM symbols, and assigned to a first transmission slot and a frequency block including the same number of subcarriers and including a plurality of OFDM symbols, and assigned to a second transmission slot are continuous in the time domain and are separated by a predetermined gap in the frequency domain, wherein the step of determining includes assigning a common control channel to an OFDM symbol at a head part of a part of the plurality of frequency blocks, and wherein the step of determining includes assigning a channel for transmitting control information indicating a selected user to an OFDM symbol at a head part in a frequency block which is different from a frequency block to which the common control channel is assigned.

10. The assignment method according to claim 9 , wherein the step of determining includes assigning at least one of a common control channel and a channel for transmitting control information indicating a selected user to at least one frequency block of the plurality of frequency blocks.

11. The assignment method according to claim 9 , wherein the step of determining includes assigning at least one of a common control channel and a channel for transmitting control information to at least one OFDM symbol of a plurality of OFDM symbols forming the frequency block.

12. The assignment method according to claim 11 , wherein the step of determining includes assigning at least one of the common control channel and the channel for transmitting control information indicating a selected user to OFDM symbols at a head part of the frequency block.